Copyright 2008 The Amanda Company, All Rights Reserved
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Tip: There is an advantage to using an IAX phone for remote users. IAX phones easily
traverse NAT (network address translators) due to only requiring port 80 be used for
communication between the IAX phone and Vdex. Port 80 will always be open to
configure the Vdex system remotely. Therefore there are no firewall issues to deal with
as there are when connecting Vdex using SIP. SIP extensions require ports 5060, and
10,000 to 20,000. See chapter 21 for more information about connecting telephones to
Vdex remotely.
** Please Note**
when using two digit extensions, limit the extension number between 10
and 50 as to avoid conflicts with other dialplan features such as call parking, call pickup,
etc. (please see Appendix A: Telephone Features Quick Reference for a full listing).
Customizing SIP/IAX Settings for each Extension:
Once extensions are added to the system, each extension’s SIP/IAX settings should be
customized for the manufacturer of the telephone. Click on the
Users
tab and then
Manage Extensions
. You’ll see a list of all the extensions that have been added to the
system (see figure 9).
Figure 9
Choose to
edit
each of the extensions
SIP/IAX Settings
and define the following
parameters:
DTMF Mode
Set the DTMF mode to RFC-2833 (this is the preferred DTMF mode with
most SIP or IAX telephones). However, if RFC-2833 is not supported by
your chosen brand of SIP telephone you will need to change the DTMF
mode to the type supported by the telephone. For example when using
Linksys SPA 942 telephones you should set the DTMF mode to AUTO.
Tip
:
Extensions must be added before IP phones can be configured to connect and use
the system.
